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BOSTON MARATHON 2025

Weimin Dai

Bib: 24920•M

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0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Gender (Male)
#0 / 16105
Masters (Masters Men)
#0 / 10463
Division (M65-69)
#0 / 639
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Course Elevation
7–469 ft
≈
×2stacked redwood trees
•▲ 890 ft climb · ▼ 1342 ft descent
Ribbon color based on
FasterSteadySlower· vs. your average pace
Start
0:00
Race begins
5K· 3.11 mi
8:49/mi
27:22
↑ 97↓ 3451.5%
10K· 6.21 mi
9:35/mi
57:09
↑ 79↓ 1380.4%
15K· 9.32 mi
10:18/mi
1:29:08
↑ 67↓ 78
20K· 12.43 mi
11:34/mi
2:05:04
↑ 106↓ 860.1%
Half· 13.11 mi
10:14/mi
2:12:03
↑ 19↓ 370.5%
25K· 15.53 mi
12:08/mi
2:41:27
↑ 66↓ 880.2%
30K· 18.64 mi
12:32/mi
3:20:24
↑ 181↓ 1480.2%
20M
11:56/mi
3:36:37
↑ 64↓ 500.2%
21M
12:14/mi
3:48:51
↑ 106↓ 241.6%
35K· 21.75 mi
10:54/mi
3:57:00
↑ 17↓ 861.7%
23M
11:16/mi
4:11:07
↑ 23↓ 630.6%
24M
10:39/mi
4:21:46
↓ 821.3%
40K· 24.85 mi
11:04/mi
4:31:14
↓ 200.3%
25.2M
11:13/mi
4:35:06
↑ 13↓ 160.2%
Finish· 26.22 mi
9:51/mi
4:45:08
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time2:12:03
Pace10:04 /mi
2nd Half
Distance13.11 mi
Time2:33:05
Pace11:41 /mi
📊Positive Split: 15.9% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:26:5127:228:4927:22
8:49
-
10K
6.21 mi11:56:3857:099:1229:47
9:35
+0:46
15K
9.32 mi12:28:371:29:089:3431:59
10:18
+0:43
20K
12.43 mi13:04:332:05:0410:0435:56
11:34
+1:16
Half
13.11 mi13:11:322:12:0310:046:59
10:14
-1:20
25K
15.53 mi13:40:562:41:2710:2429:24
12:08
+1:54
30K
18.64 mi14:19:533:20:2410:4538:57
12:32
+0:24
20M
20.00 mi14:36:063:36:3710:5016:13
11:56
-0:36
21M
21.00 mi14:48:203:48:5110:5412:14
12:14
+0:18
35K
21.75 mi14:56:293:57:0010:548:09
10:54
-1:20
23M
23.00 mi15:10:364:11:0710:5514:07
11:16
+0:22
24M
24.00 mi15:21:154:21:4610:5410:39
10:39
-0:37
40K
24.85 mi15:30:434:31:1410:559:28
11:04
+0:25
25.2M
25.20 mi15:34:354:35:0610:553:52
11:13
+0:09
Finish
26.22 mi15:44:374:45:0810:5310:02
9:51
-1:22

Checkpoints & Pacing

📈Pace Line

Pace Progression

Track your pace changes throughout the race. Dot colors mark your quickest to easiest segments, relative to your own pace.

Fastest Pace

8:49 /mi

Average Pace

10:53 /mi

Slowest Pace

12:32 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:46:09

37% of race

Time at Steady Pace

1:22:11

29% of race

Time at Slower Pace

1:36:48

34% of race

Average Pace: 10:52 /mi

Loading chart...
Faster pace (< avg)
Steady pace (≈ avg)
Slower pace (> avg)

🎨Heatmap

Pace Heatmap

Where you sped up and eased off relative to your own pace across the race. Colors are relative to your own range, not to other runners.

Loading...
0mi6.6mi13.1mi19.7mi26.2mi
Pace:
Faster
Steady
Slower

Click or hover over segments to see details

✨Sparklines

Checkpoint Splits with Pace Trends

Overall Pace Trend

CheckpointDistanceTime of DayTimeAvg PaceSegmentPaceTrendRank
5K
3.11 mi11:26:5127:228:4927:22
8:49
#21559
10K
6.21 mi11:56:3857:099:1229:47
9:35
#23193
15K
9.32 mi12:28:371:29:089:3431:59
10:18
#24206
20K
12.43 mi13:04:332:05:0410:0435:56
11:34
#25160
Half
13.11 mi13:11:322:12:0310:046:59
10:14
#25170
25K
15.53 mi13:40:562:41:2710:2429:24
12:08
#25497
30K
18.64 mi14:19:533:20:2410:4538:57
12:32
#25678
20M
20.00 mi14:36:063:36:3710:5016:13
11:56
#25629
21M
21.00 mi14:48:203:48:5110:5412:14
12:14
#25547
35K
21.75 mi14:56:293:57:0010:548:09
10:54
#25498
23M
23.00 mi15:10:364:11:0710:5514:07
11:16
#25415
24M
24.00 mi15:21:154:21:4610:5410:39
10:39
#25343
40K
24.85 mi15:30:434:31:1410:559:28
11:04
#25284
25.2M
25.20 mi15:34:354:35:0610:553:52
11:13
#25246
Finish
26.22 mi15:44:374:45:0810:5310:02
9:51
#25191
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM65-69Seg. OverallSeg. MalesSeg. M65-69
5K3.11 mi3.11 mi21559131151311525584(Top 90%)14966(Top 93%)14966(Top 2342%)
10K6.21 mi3.10 mi23193-163413879-76413879-76424324(Top 86%)14387(Top 89%)14387(Top 2251%)
15K9.32 mi3.11 mi24206-101314351-47214351-47225584(Top 90%)14966(Top 93%)14966(Top 2342%)
20K12.43 mi3.11 mi25160-95414775-42414775-42426700(Top 94%)15420(Top 96%)15420(Top 2413%)
Half13.11 mi0.68 mi25170-10147751477525314(Top 89%)14807(Top 92%)14807(Top 2317%)
25K15.53 mi2.42 mi25497-32714913-13814913-13826562(Top 94%)15322(Top 95%)15322(Top 2398%)
30K18.64 mi3.11 mi25678-18114952-3914952-3926213(Top 92%)15075(Top 94%)15075(Top 2359%)
20M20.00 mi1.36 mi25629+4914920+3214920+3225166(Top 89%)14533(Top 90%)14533(Top 2274%)
21M21.00 mi1.00 mi25547+8214882+3814882+3823992(Top 84%)13907(Top 86%)13907(Top 2176%)
35K21.75 mi0.75 mi25498+4914847+3514847+3523992(Top 84%)13882(Top 86%)13882(Top 2172%)
23M23.00 mi1.25 mi25415+8314787+6014787+6023836(Top 84%)13758(Top 85%)13758(Top 2153%)
24M24.00 mi1.00 mi25343+7214752+3514752+3523205(Top 82%)13415(Top 83%)13415(Top 2099%)
40K24.85 mi0.85 mi25284+5914714+3814714+3823313(Top 82%)13404(Top 83%)13404(Top 2098%)
25.2M25.20 mi0.35 mi25246+3814698+1614698+1621271(Top 75%)12433(Top 77%)12433(Top 1946%)
Finish26.22 mi1.02 mi25191+5514664+3414664+3422447(Top 79%)12999(Top 81%)12999(Top 2034%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 90%
×21story building
+97ft-345ft

Overall

25584

Males

14966

M65-69

14966

5K→10K

3.1 - 6.2 mi

Top 86%
×5story building
+79ft-138ft

Overall

24324

Males

14387

M65-69

14387

10K→15K

6.2 - 9.3 mi

Top 90%
×3story building
+67ft-78ft

Overall

25584

Males

14966

M65-69

14966

15K→20K

9.3 - 12.4 mi

Top 94%
×5story building
+106ft-86ft

Overall

26700

Males

15420

M65-69

15420

20K→Half

12.4 - 13.1 mi

Top 89%
×2story building
+19ft-37ft

Overall

25314

Males

14807

M65-69

14807

Half→25K

13.1 - 15.5 mi

Top 94%
×4story building
+66ft-88ft

Overall

26562

Males

15322

M65-69

15322

25K→30K

15.5 - 18.6 mi

Top 92%
×9story building
+181ft-148ft

Overall

26213

Males

15075

M65-69

15075

30K→20M

18.6 - 20.0 mi

Top 89%
×5story building
+64ft-50ft

Overall

25166

Males

14533

M65-69

14533

20M→21M

20.0 - 21.0 mi

Top 84%
×8story building
+106ft-24ft

Overall

23992

Males

13907

M65-69

13907

21M→35K

21.0 - 21.8 mi

Top 84%
×7story building
+17ft-86ft

Overall

23992

Males

13882

M65-69

13882

35K→23M

21.8 - 23.0 mi

Top 84%
×5story building
+23ft-63ft

Overall

23836

Males

13758

M65-69

13758

23M→24M

23.0 - 24.0 mi

Top 82%
×6story building
+12ft-82ft

Overall

23205

Males

13415

M65-69

13415

24M→40K

24.0 - 24.9 mi

Top 82%
×1story
+6ft-20ft

Overall

23313

Males

13404

M65-69

13404

40K→25.2M

24.9 - 25.2 mi

Top 75%
×1story
+13ft-16ft

Overall

21271

Males

12433

M65-69

12433

25.2M→Finish

25.2 - 26.2 mi

Top 79%
×2story building
+22ft-21ft

Overall

22447

Males

12999

M65-69

12999

Passing Analysis

Category:
Athletes Passed
724
Passed By
4356
Net Change
-3632
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#21559
5K → 10K141648-1634#21559#23193
10K → 15K231036-1013#23193#24206
15K → 20K14968-954#24206#25160
20K → Half2535-10#25160#25170
Half → 25K23350-327#25170#25497
25K → 30K69250-181#25497#25678
30K → 20M7324+49#25678#25629
20M → 21M9210+82#25629#25547
21M → 35K556+49#25547#25498
35K → 23M9411+83#25498#25415
23M → 24M8210+72#25415#25343
24M → 40K656+59#25343#25284
40K → 25.2M391+38#25284#25246
25.2M → Finish561+55#25246#25191
TOTALS7244356-3632
📊

Passing Visuals

Category:
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🔄Passing Circle

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🌊Position Flow

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🏃Race Lanes

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Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing